17-05-2018 дата публикации
Номер: US20180136049A1
A carbon atmosphere thermometer has: a thermocouple having thermocouple wires , a thermocouple temperature measuring junction , and an insulating tube ; a first protection tube surrounding the thermocouple, while at least partially spaced apart from the thermocouple wires and others of the thermocouple; and a second protection tube surrounding the first protection tube , while at least partially spaced apart from the first protection tube . For this reason, it becomes feasible to protect the thermocouple from the external environment, while preventing the thermocouple from reacting with the first protection tube . Furthermore, it becomes feasible to protect the thermocouple and the first protection tube from the external environment, while preventing the first protection tube from reacting with the second protection tube 1. A thermometer comprising:a thermocouple having a pair of wires, a temperature measuring junction between the wires, and an insulator covering the wires;a first protection tube surrounding the wires, the temperature measuring junction, and the insulator of the thermocouple, while at least partially spaced apart from the wires, the temperature measuring junction, and the insulator of the thermocouple, wherein the first protection tube contains any one of Mo, W, Ta, and Ir as a primary component; and{'sub': 2', '3, 'a second protection tube surrounding the first protection tube, while at least partially spaced apart from the first protection tube, wherein the second protection tube contains any one of graphite, C/C composite, glassy carbon, SiC, BN, AlO, vitreous carbon, pyrolytic carbon-coated graphite, vitreous carbon-coated graphite, and PBN.'}2. The thermometer according to claim 1 , wherein at least either of an interior of the first protection tube or a space between the first protection tube and the second protection tube is filled with an inert gas.3. The thermometer according to claim 1 , wherein the second protection tube contains any one ...
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